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12/3/17 4:41pm - Original Message: 'Hooker SuperComp Headers'
Wally71 Gold Member
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Palos Heights, IL - USA

Vette(s):
1971 LT 1 4spd Coupe numbers matching #s114893

Joined: 2/8/2013
Posts: 10
I am replacing my old Headman Headers 15yrs old with a new set Of Hooker SuperComp. My LT1 motor is a stroker 383 with Dart Alum Heads . Will I need to retune at all or dyno the car after the change? Exhaust tubes going to 13/4 dia from 15/8 on old set, these are long tube I don't know what the old ones are. New headers are ceramic coated



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Today 9:57am - Reply: 'Re: Hooker SuperComp Headers'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6806
Good choice in headers. I have them on my 406 SBC - pretty awesome!

Are you racing the car? I don't know that dyne tuning for a header change is necessary, unless you're really trying to determine the net difference. It could actually go down a little if the velocity of exhaust gases slows down due to the increased exhaust volume. However with a 383 with good compression, you'll probably see some incremental gains.

I would just adjust carb settings to get good plug readings and drive it!

Good luck!

Paul


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 Forums -> C3 Fuel, Emission Control, and Exhaust Systems
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